When Shanghai receives epidemic prevention information, the nucleic acid will change the code.

From March 16, Shanghai organized nucleic acid screening in key areas and non-key areas throughout the city. At present, a small number of residents have not participated in the screening. For these residents, the CDC will arrange community testing services in due course. Please pay attention to the community notice and actively cooperate. Five notes on nucleic acid: First, people with sensitive throat should not eat or drink water two hours before doing nucleic acid to prevent vomiting caused by testing; Second, don't chew gum, eat areca or drink alcohol before nucleic acid testing, which will affect the test results; Third, keep a distance of one meter when queuing for nucleic acid testing, especially don't take off your mask and chat; 4. Don't put personal mobile phones, keys, wallets, etc. Put it on the inspection table to prevent cross infection; Fifth, it is best not to make a sound or shout "ah" during the test.